diff --git a/external/kafka/src/main/scala/org/apache/spark/streaming/kafka/KafkaRDD.scala b/external/kafka/src/main/scala/org/apache/spark/streaming/kafka/KafkaRDD.scala
index d56cc01be9514..6d465bcb6bfc0 100644
--- a/external/kafka/src/main/scala/org/apache/spark/streaming/kafka/KafkaRDD.scala
+++ b/external/kafka/src/main/scala/org/apache/spark/streaming/kafka/KafkaRDD.scala
@@ -86,7 +86,7 @@ class KafkaRDD[
     val part = thePart.asInstanceOf[KafkaRDDPartition]
     assert(part.fromOffset <= part.untilOffset, errBeginAfterEnd(part))
     if (part.fromOffset == part.untilOffset) {
-      log.warn("Beginning offset ${part.fromOffset} is the same as ending offset " +
+      log.warn(s"Beginning offset ${part.fromOffset} is the same as ending offset " +
         s"skipping ${part.topic} ${part.partition}")
       Iterator.empty
     } else {